Dihydrocumic acid was prepared from β-pinene through oxidation and dehydration. Then a series of amide derivatives
from dihydrocumic acid were synthesized. Reaction conditions of dihydrocumic acid were discussed and structures
of amide derivatives were characterized by IR, 1H NMR, MS, and X-ray diffraction. The antibacterial activities of
these newly synthesized amide derivatives against six bacteria were also investigated by an inhibition zone method. It was
shown that compounds 5a, 5b, 5d, and 5f display better anti-bacterial activities with inhibition zones 11.83, 12.33, 10.83
and 12.67 mm against Escherichia coli compared with Bromogeramine (9.67 mm), one commercially available antibacterial
agent, and compounds 5a and 5d display better anti-bacterial activities against Staphyloccocus aureu compared with
Ampicillin Na.
从
β-蒎烯通过氧化和脱
水制备了二氢香芹酸,随后合成了一系列二氢香芹酸的酰胺衍
生物。讨论了二氢香芹酸的反应条件,并通过红外光谱(IR)、核磁共振氢谱(1H NMR)、质谱(MS)和X射线衍射表征了酰胺衍
生物的结构。此外,采用抑菌圈法研究了这些新合成的酰胺衍
生物对六种细菌的抗菌活性。结果表明,化合物5a、5b、5d和5f相较于商业抗菌剂
溴莫普林(抑菌圈直径9.67 mm),对大肠杆菌显示出更好的抗菌活性,抑菌圈直径分别为11.83、12.33、10.83和12.67毫米;并且化合物5a和5d对
金黄色葡萄球菌的抗菌活性优于
氨苄西林钠。